090
FNCA52 TJSJ 111930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST WED MAR 11 2026
DISCUSSION
THE KBDI REMAINS ABOVE CRITICAL FIRE WEATHER THRESHOLDS IN CABO
ROJO (670) AND BELOW THRESHOLDS IN GUANICA (520) AND CAMP
SANTIAGO (390). AROUND 10 AM AST AND NOON, SURFACE OBSERVATIONS
SHOWED RH VALUES IN THE LOW 50S IN CABO ROJO AND OTHER AREAS IN
SOUTHERN AREAS OF PUERTO RICO AND ALSO IN ST. THOMAS. THE REST OF
THE AFTERNOON, PASSING SHOWERS WILL CONTINUE TO MOVE ACROSS THE
AREA FROM TIME TO TIME; HOWEVER, DRYING SOILS, LOWER HUMIDITY
LATER IN THE DAY AND AND STRONG WINDS WILL MAINTAIN A MODERATE TO
ELEVATED FIRE DANGER RISK TODAY, PARTICULARLY FOR SOUTHWESTERN
PUERTO RICO. TONIGHT INTO SATURDAY, WINDS ARE EXPECTED TO BECOME
LIGHT TO MODERATE. ADDITIONALLY, RH VALUES ARE EXPECTED INCREASE
DUE TO THE ARRIVAL OF ANOTHER PATCH OF MOISTURE INTO THE AREA. AT
THIS TIME AN RFD WILL NOT BE ISSUED, BUT WE ENCOURAGE PARTNERS TO
CONTINUE MONITORING CONDITIONS IN THE COMING DAYS.
PRZ014-120800-
SOUTHEAST COASTAL PLAINS-
330 PM AST WED MAR 11 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 10 40 0 10
TEMP (24H TREND) 69 (-3) 87 (+2) 69 87
RH % (24H TREND) 82 (+1) 47 (-5) 83 48
WIND 20FT/EARLY(MPH) NE 13 E 11 E 10 E 13 G21
WIND 20FT/LATE(MPH) NE 9 SE 13 NE 8 E 16 G23
MIXING HGT(FT-AGL/MSL) 5580 4960
TRANSPORT WND (MPH) E 12 E 14
VENT RATE (KT-FT) 55800 59520
DISPERSION 5 5
DSI 3 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-120800-
SOUTHERN HILLS-
330 PM AST WED MAR 11 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 50 0 20
TEMP (24H TREND) 66 (-3) 83 (+3) 66 84
RH % (24H TREND) 90 (+4) 59 (-6) 90 59
WIND 20FT/EARLY(MPH) NE 12 E 10 E 10 E 12
WIND 20FT/LATE(MPH) NE 11 E 11 NE 9 E 13
MIXING HGT(FT-AGL/MSL) 6170 5630
TRANSPORT WND (MPH) E 10 E 12
VENT RATE (KT-FT) 55530 56300
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-120800-
NORTH COASTAL PLAINS-
330 PM AST WED MAR 11 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 20 10
TEMP (24H TREND) 69 (-2) 85 (+1) 69 85
RH % (24H TREND) 93 (+4) 58 (-7) 90 58
WIND 20FT/EARLY(MPH) E 18 E 12 E 12 E 13
WIND 20FT/LATE(MPH) E 12 E 16 SE 9 E 18
MIXING HGT(FT-AGL/MSL) 5360 4680
TRANSPORT WND (MPH) E 12 E 15
VENT RATE (KT-FT) 53600 60840
DISPERSION 5 5
DSI 5 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-120800-
NORTHERN HILLS-
330 PM AST WED MAR 11 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 60 10 30
TEMP (24H TREND) 65 (-4) 84 (+2) 66 86
RH % (24H TREND) 95 (+3) 59 (-5) 91 56
WIND 20FT/EARLY(MPH) E 16 E 11 E 10 E 12
WIND 20FT/LATE(MPH) E 10 E 12 SE 6 E 14
MIXING HGT(FT-AGL/MSL) 6360 5550
TRANSPORT WND (MPH) E 9 E 12
VENT RATE (KT-FT) 50880 55500
DISPERSION 5 5
DSI 4 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-120800-
WEST COAST-
330 PM AST WED MAR 11 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 70 10 60
TEMP (24H TREND) 66 (-3) 86 (0) 67 87
RH % (24H TREND) 92 (+4) 57 (-6) 91 56
WIND 20FT/EARLY(MPH) E 19 E 10 E 10 E 10
WIND 20FT/LATE(MPH) E 14 E 10 E 9 E 12
MIXING HGT(FT-AGL/MSL) 5620 5040
TRANSPORT WND (MPH) E 6 E 7
VENT RATE (KT-FT) 28100 30240
DISPERSION 5 5
DSI 3 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-120800-
EASTERN INTERIOR-
330 PM AST WED MAR 11 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 30 20
TEMP (24H TREND) 67 (-3) 84 (+2) 67 86
RH % (24H TREND) 90 (0) 59 (-6) 90 58
WIND 20FT/EARLY(MPH) E 13 E 9 E 11 E 12
WIND 20FT/LATE(MPH) E 12 E 11 E 10 E 12
MIXING HGT(FT-AGL/MSL) 6240 5160
TRANSPORT WND (MPH) E 10 E 14
VENT RATE (KT-FT) 56160 61920
DISPERSION 5 5
DSI 3 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-120800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST WED MAR 11 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY MCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 70 50 40
TEMP (24H TREND) 65 (-3) 80 (+4) 65 79
RH % (24H TREND) 95 (+2) 64 (-8) 96 65
WIND 20FT/EARLY(MPH) E 11 E 6 E 9 E 11
WIND 20FT/LATE(MPH) E 9 E 9 E 8 E 11
MIXING HGT(FT-AGL/MSL) 4740 4520
TRANSPORT WND (MPH) E 10 E 13
VENT RATE (KT-FT) 42660 49720
DISPERSION 5 5
DSI 4 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-120800-
CENTRAL MOUNTAIN RANGE-
330 PM AST WED MAR 11 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 70 10 50
TEMP (24H TREND) 62 (-4) 82 (+4) 63 83
RH % (24H TREND) 95 (+4) 60 (-7) 93 60
WIND 20FT/EARLY(MPH) E 13 E 6 E 6 E 8
WIND 20FT/LATE(MPH) E 10 E 8 E 6 E 9
MIXING HGT(FT-AGL/MSL) 6920 6150
TRANSPORT WND (MPH) E 7 E 9
VENT RATE (KT-FT) 41520 49200
DISPERSION 5 5
DSI 2 5 1 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-120800-
CAYEY MOUNTAIN RANGE-
330 PM AST WED MAR 11 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 50 10 10
TEMP (24H TREND) 66 (-2) 79 (+2) 66 80
RH % (24H TREND) 92 (-1) 66 (-4) 95 64
WIND 20FT/EARLY(MPH) E 11 E 8 E 8 E 11
WIND 20FT/LATE(MPH) E 8 E 10 E 6 E 11
MIXING HGT(FT-AGL/MSL) 5820 4850
TRANSPORT WND (MPH) E 12 E 15
VENT RATE (KT-FT) 58200 63050
DISPERSION 5 5
DSI 3 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-120800-
VIEQUES-
330 PM AST WED MAR 11 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 70 50 40
TEMP (24H TREND) 72 (-1) 85 (0) 72 85
RH % (24H TREND) 84 (0) 55 (-4) 84 56
WIND 20FT/EARLY(MPH) E 17 E 11 E 13 E 16
WIND 20FT/LATE(MPH) E 14 E 11 E 13 E 14
MIXING HGT(FT-AGL/MSL) 3560 3540
TRANSPORT WND (MPH) E 13 E 18
VENT RATE (KT-FT) 39160 56640
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-120800-
CULEBRA-
330 PM AST WED MAR 11 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 70 50 50
TEMP (24H TREND) 71 (-3) 86 (+2) 71 85
RH % (24H TREND) 89 (+4) 55 (-8) 90 57
WIND 20FT/EARLY(MPH) E 16 E 11 E 13 E 14
WIND 20FT/LATE(MPH) E 14 E 11 E 13 E 13
MIXING HGT(FT-AGL/MSL) 3510 3600
TRANSPORT WND (MPH) E 14 E 18
VENT RATE (KT-FT) 42120 57600
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-120800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST WED MAR 11 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 50 10 20
TEMP (24H TREND) 67 (-4) 88 (+2) 68 87
RH % (24H TREND) 86 (+4) 47 (-7) 87 47
WIND 20FT/EARLY(MPH) E 14 E 11 E 10 E 12
WIND 20FT/LATE(MPH) E 13 E 12 E 9 SE 16 G23
MIXING HGT(FT-AGL/MSL) 5580 5410
TRANSPORT WND (MPH) E 10 E 10
VENT RATE (KT-FT) 50220 48690
DISPERSION 5 5
DSI 3 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-120800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST WED MAR 11 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 60 50 40
TEMP (24H TREND) 68 (-6) 82 (0) 69 82
RH % (24H TREND) 98 (+13) 60 (-4) 95 59
WIND 20FT/EARLY(MPH) E 17 E 12 E 14 E 16
WIND 20FT/LATE(MPH) E 14 E 12 E 14 E 14
MIXING HGT(FT-AGL/MSL) 3740 3720
TRANSPORT WND (MPH) E 15 E 20
VENT RATE (KT-FT) 48620 63240
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-120800-
ST CROIX-
330 PM AST WED MAR 11 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 30 40
TEMP (24H TREND) 70 (-5) 85 (+1) 70 85
RH % (24H TREND) 89 (+7) 57 (-3) 91 58
WIND 20FT/EARLY(MPH) E 14 E 12 E 13 E 16
WIND 20FT/LATE(MPH) E 14 E 12 E 13 E 16
MIXING HGT(FT-AGL/MSL) 4570 4190
TRANSPORT WND (MPH) E 15 E 18
VENT RATE (KT-FT) 59410 67040
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
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